果园化栽培模式杜仲雄花、果实和叶片产量的调查分析

Investigation of Male Flower,Fruit and Leaf Yield from An Eucommia ulmoides Orchard System

杜仲（Eucommia ulmoides Oliv）属杜仲科（Eu—commiaceae），本科仅l属1种，是仅存于我国的第三纪孑遗植物，名贵经济树种，国家二级保护树种。杜仲叶、雄花、果皮和杜仲皮都含有多种具有独特的医疗保健功能的活性物质阻引。

In order to explore the key site conditions affecting Eucommia fruit and leaf yield from an Eucommia Or-chard-Like System, the fruit and leaf yields of Fucommia trees over 6 years after grafted were measured by the meth-od of mean sample tree from permanent plots in ingbao Eucommia Base, He＇ nan Province, China. Meanwhile, the harvest efficiency was calculated by means of i,ineasuring the real harvest of male flower and fruit to assess the productivity under such cultivation model. The male flower yield per tree, fruit yield per tree and leaf yield per tree differed statistically significant, and they were not positively correlated with the age of tree. In terms of site condi-tions, elevation and soil depth were main factors affecting fruit and leaf yield. The highest mean fruit and leaf yield per tree was achieved at the soil depth of 40-70 cm, followed by the soil depth 〉 70 cm and the lowest yield at the soil depth 〈40 cm. This study revealed that the base diameter and tree height of Eucommia tree over 8 years old in different permanent plots differed significantly, while there was no significant positively correlation between the above growth indexes and the age of tree. The mean tree height ranged from 5.36 m to 7.48 m.